Plenty of anime shows have tackled the subject of Otaku culture, but these examples represent some of the very best.
Otaku Culture in Japan Anime, Manga, Idols & Video Games
The Best Anime of 2022, Ranked
Best Manga About Japanese Work Culture
Best Anime By Sunrise, Ranked
Otaku Culture in Japan: A Journey into the World of Passionate Fandom
Occidental Otaku - TV Tropes
Best Anime About Otaku Culture
Best Avant Garde Anime
Best Manga About Japanese Work Culture
Wotaku ni Koi wa Muzukashii (Wotakoi: Love is Hard for Otaku)
Top 10 Best Anime with Otaku Main Character – Desuzone
Another Another Anime – Otaku Central, the another anime
OTAKU: What Japanese People Mean When They Say It
17 Things You Need To Know About Otaku Culture In Japan - Japan Insider